JP2017512454A - Charging circuit and terminal - Google Patents

Abstract

Embodiments of the present invention disclose a charging circuit and a terminal, the charging circuit including: The first input / output end of the wired connection module is configured to be connected to the output end of the wired charger, and the second input / output end of the wired connection module is connected to the first input end of the switch circuit. The second input / output terminal is further connected to the first input / output terminal of the shunt circuit, and the first input terminal of the control circuit is connected to the second input / output terminal of the wired connection module for control. The output end of the circuit is connected to the enable end of the wireless charging module, the output end of the wireless charging module is connected to the second input end of the switch circuit, and the first output end of the switch circuit is connected to the charge management module Connected to the input / output end, the second input / output end of the shunt circuit is connected to the input / output end of the charge management module, and the third end of the shunt circuit is connected to the output end of the wireless charging module The charge management module Output is configured to be connected to the battery, in this way, can be solved how the problem of how to integrate on the terminal and a wired charging technology and wireless charging technology.

Description

  The present invention relates to the field of electronics, and more particularly to a charging circuit and a terminal.

  With the development of electronic technology, wireless charging technology is gradually being applied to terminals including batteries such as mobile phones, tablet computers, or remote control devices. In the wireless charging process, it is not necessary to connect the terminal to the power source using a wired connection, and thus the user can use the terminal at a location relatively distant from the power source. However, some users use wired charging, some users use wireless charging, or the charging signal current during wireless charging is so low that the charging time is relatively long. For these reasons, terminal manufacturers typically want to configure two methods for their terminals: wired charging and wireless charging. However, how to integrate wired charging technology and wireless charging technology on the terminal is a problem that the terminal manufacturer needs to solve urgently.

  Embodiments of the present invention provide a charging circuit and a terminal, whereby wired charging technology and wireless charging technology can be integrated on the terminal.

According to a first aspect, the present invention provides a charging circuit including a wired connection module, a wireless charging module, a switch circuit, a control circuit, a shunt circuit, and a charge management module,
The first input / output end of the wired connection module is configured to be connected to the output end of the wired charger, and the second input / output end of the wired connection module is connected to the first input end of the switch circuit. The second input / output end of the wired connection module is further connected to the first input / output end of the shunt circuit;
The first input / output end of the control circuit is connected to the second input / output end of the wired connection module, the second input / output end of the control circuit is connected to the enable end of the wireless charging module,
The output end of the wireless charging module is connected to the second input end of the switch circuit,
The first output terminal of the switch circuit is connected to the input / output terminal of the charge management module,
The second input / output end of the shunt circuit is connected to the input / output end of the charge management module, and the third end of the shunt circuit is connected to the output end of the wireless charging module,
The output end of the charge management module is configured to be connected to a battery.

Referring to the first aspect, in a first possible embodiment, the wired connection module is configured to receive a first charging signal output by a wired charger, wherein the first charging signal is: After passing through the second input / output end of the wired connection module, the first input end of the switch circuit, the first output end of the switch circuit, the input end of the charge management module, and the output end of the charge management module If charging and the third end of the shunt circuit does not receive the second charging signal output by the output of the wireless charging module, the first input / output end of the shunt circuit and the second end of the shunt circuit The first charging signal is transmitted to the second input / output terminal of the wired connection module, the first input / output terminal of the shunt circuit, and the second input / output terminal of the shunt circuit. , The input end of the charge management module, and the charging The battery is charged after passing through the output end of the management module, the first charging signal is further transmitted to the first input end of the control circuit using the second input / output end of the wired connection module, and the control circuit When the first input terminal receives the first charging signal, the output terminal of the control circuit outputs a high level signal, and the high level signal is transmitted to the enable terminal of the wireless charging module. The enable end receives a high level signal and the output end of the wireless charging module does not output a signal, or
The wireless charging module is configured to receive a second charging signal output by the wireless charger, the enable end of the wireless charging module receives a low level signal, and the second charging signal is transmitted from the wireless charging module. The battery is charged after passing through the output end, the second input end of the switch circuit, the first output end of the switch circuit, the input end of the charge management module, and the output end of the charge management module.

  With reference to the first aspect or the first possible embodiment of the first aspect, in the second possible embodiment, the third end of the shunt circuit is connected to the output end of the wireless charging module Specifically, this means that the third end of the shunt circuit is connected to the output end of the wireless charging module using a protection circuit.

Referring to the first aspect, the first possible embodiment of the first aspect, or the second possible embodiment of the first aspect, in the third possible embodiment, the shunt circuit is P Including at least one group of type MOS transistors,
Each group of P-type MOS transistors includes a first P-type MOS transistor and a second P-type MOS transistor, and the drain electrode of the first P-type MOS transistor is connected to the second input / output terminal of the wired connection module. Connected, the source electrode of the first P-type MOS transistor is connected to the source electrode of the second P-type MOS transistor, and the drain electrode of the second P-type MOS transistor is connected to the input / output terminal of the charge management module The gate electrode of the first P-type MOS transistor is connected to the gate electrode of the second P-type MOS transistor, and the gate electrode of the first P-type MOS transistor is connected to the output terminal of the wireless charging module using a protection circuit Each group of P-type MOS transistors includes a first P-type MOS transistor and a second P-type MOS transistor, and the source electrode of the first P-type MOS transistor is the second input / output of the wired connection module The drain electrode of the first P-type MOS transistor is connected to the drain electrode of the second P-type MOS transistor, and the source electrode of the second P-type MOS transistor is connected to the input / output end of the charge management module The gate electrode of the first P-type MOS transistor is connected to the gate electrode of the second P-type MOS transistor, and the gate electrode of the first P-type MOS transistor is connected to the output terminal of the wireless charging module using a protection circuit. Connected to.

Referring to any of the above embodiments of the first aspect, in a fourth possible embodiment, the control circuit includes a resistor R3, a resistor R4, a resistor R5, and a first N-type MOS transistor;
One end of the resistor R3 is connected to the second input / output end of the wired connection module, the other end of the resistor R3 is connected to the gate electrode of the first N-type MOS transistor and one end of the resistor R4, and one end of the resistor R4 is Connected to the gate electrode of the first N-type MOS transistor, the other end of the resistor R4 is grounded, and the drain electrode of the first N-type MOS transistor is configured to be connected to a stable potential. The source electrode of the type MOS transistor is connected to the enable end of the wireless charging module, and the source electrode of the first N type MOS transistor is further grounded using the resistor R5.

Referring to any of the above embodiments of the first aspect, in a fifth possible embodiment, the circuit further comprises a controller and the enable end of the wireless charging module is the first input / output of the controller Connected further to the end,
The first input / output end of the wired connection module is further configured to be connected to an external device;
The controller is configured to output a high level signal to the enable end of the wireless charging module when the first input / output end of the wired connection module is connected to an external device, and the output end of the wireless charging module is When the enable end of the wireless charging module receives a high level signal, it does not output a signal,
The controller is further configured to control the charge management module, wherein the current output by the charge management module is a second input / output end of the shunt circuit, a first input / output end of the shunt circuit, a wired connection module After passing through the second input / output end of the first and the first input / output end of the wired connection module, power is supplied to the external device.
Referring to the fifth possible embodiment of the first aspect, in the sixth possible embodiment, the circuit further comprises a display signal transmission circuit and a display screen, the input end of the display signal transmission circuit being a switch circuit Connected to the second output terminal of the display, the output terminal of the display signal transmission circuit is connected to the second input / output terminal of the controller, and the input terminal of the display screen is connected to the third input / output terminal of the controller. ,
The switch circuit is further configured to output a high level signal using the second output terminal of the switch circuit when the switch circuit receives the first charging signal, and the input terminal of the display signal transmission circuit is When a high level signal is received, the display signal transmission circuit outputs a low level signal to the controller, and the controller outputs a first display command to the display screen according to the low level signal transmitted by the display signal transmission circuit. The display screen is further configured to display a first display message according to a first display instruction, the first display message is currently being wired charged to the battery The switch circuit is used to indicate that when the switch circuit receives the second charge signal, the switch circuit uses the second output terminal of the switch circuit to generate a low level signal. When the input end of the display signal transmission circuit receives a low level signal, the display signal transmission circuit outputs a high level signal to the controller, and the controller is transmitted by the display signal transmission circuit. Further configured to output a second display command to the display screen according to the high level signal, wherein the display screen is configured to display the second display message according to the second display command, The display message is used to indicate that wireless charging is currently being performed on the battery, or
The switch circuit is further configured to output a low level signal using the second output terminal of the switch circuit when the switch circuit receives the first charging signal, and the input terminal of the display signal transmission circuit is When a low level signal is received, the display signal transmission circuit outputs a high level signal to the controller, and the controller outputs a first display command to the display screen according to the high level signal transmitted by the display signal transmission circuit. The display screen is further configured to display a first display message according to a first display instruction, the first display message is currently being wired charged to the battery The switch circuit is used to indicate that when the switch circuit receives the second charging signal, the switch circuit uses the second output terminal of the switch circuit to generate a high level signal. When the input terminal of the display signal transmission circuit receives a high level signal, the display signal transmission circuit outputs a low level signal to the controller, and the controller is transmitted by the display signal transmission circuit. Further configured to output a second display command to the display screen according to the low level signal, wherein the display screen is configured to display the second display message according to the second display command, The display message is used to indicate that wireless charging is currently being performed on the battery.

With reference to the third possible embodiment of the first aspect, in the seventh possible embodiment:
The protection circuit includes a resistor R1, a resistor R2, and a capacitor C1, and the resistor R1 is connected in series between the gate electrode of the first P-type MOS transistor and the output terminal of the wireless charging module, and the capacitor C1 is The first P-type MOS transistor is connected in series between the gate electrode and the ground, and the resistor R2 is connected in series between the output terminal of the wireless charging module and the ground.

With reference to the sixth possible embodiment of the first aspect, in an eighth possible embodiment, the display signal transmission circuit includes a resistor R6, a resistor R7, and a second N-type MOS transistor;
The gate electrode of the second N-type MOS transistor is connected to the second output terminal of the switch circuit, and the gate electrode of the second N-type MOS transistor is further grounded using a resistor R7, and the second N-type MOS transistor The drain electrode of the MOS transistor is connected to the second input / output terminal of the controller, the drain electrode of the second N-type MOS transistor is further connected to a stable potential using the resistor R6, and the second N-type The source electrode of the MOS transistor is grounded.

Referring to any of the above embodiments of the first aspect, in a ninth possible embodiment, the circuit further comprises a first electrostatic protection circuit, the first electrostatic protection circuit comprising a capacitor Including C2, capacitor C3, and electrostatic protection diode D1,
One end of the capacitor C2 is connected to the output end of the wireless charging module, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is connected to the output end of the wireless charging module, and the other end of the capacitor C3 is grounded. One end of the electric protection diode D1 is connected to the output end of the wireless charging module, and the other end of the electrostatic protection diode D1 is grounded.

Referring to any of the above embodiments of the first aspect, in a tenth possible embodiment, the circuit further comprises a second ESD protection circuit, wherein the second ESD protection circuit is static Including the protection diode D2,
One end of the electrostatic protection diode D2 is connected to the enable end of the wireless charging module and the first input / output end of the controller, and the other end of the electrostatic protection diode D2 is grounded.

  According to the second aspect, one embodiment of the present invention further provides a terminal including the charging circuit of any of the embodiments provided in the first aspect.

  In the above technical solution, the first input / output end of the wired connection module is configured to be connected to the output end of the wired charger, and the second input / output end of the wired connection module is connected to the switch circuit. Connected to the first input terminal, the second input / output terminal is further connected to the first input / output terminal of the shunt circuit, and the first input terminal of the control circuit is the second input of the wired connection module. The output end of the control circuit is connected to the enable end of the wireless charging module, the output end of the wireless charging module is connected to the second input end of the switch circuit, and the first end of the switch circuit The output end is connected to the input / output end of the charge management module, the second input / output end of the shunt circuit is connected to the input / output end of the charge management module, and the third end of the shunt circuit is Connect to the output end of the wireless charging module Is, the output end of the charging management module is configured to be connected to the battery. In this way, the above circuit can realize wired charging and wireless charging for the battery of the terminal, thereby how to integrate the wired charging technique and the wireless charging technique on the terminal. The problem can be solved.

  To describe the technical solutions more clearly in the embodiments of the present invention or in the prior art, the drawings necessary for describing the embodiments or the prior art will be briefly described below. Apparently, the accompanying drawings in the following description show only some embodiments of the present invention, and those skilled in the art will further derive other drawings from these accompanying drawings without creative efforts. can do.

It is a schematic block diagram of the charging circuit by one Embodiment of this invention. It is the schematic of the direction through which the charge signal of wired charging flows. It is the schematic of the direction through which the charge signal of wireless charging flows. It is a schematic block diagram of another charging circuit by one Embodiment of this invention. It is a schematic block diagram of another charging circuit by one Embodiment of this invention. It is a schematic block diagram of another charging circuit by one Embodiment of this invention.

  The technical solutions of the embodiments of the present invention will be clearly described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

  In the embodiment of the present invention, the charging circuit can be applied to any terminal including a battery such as a mobile phone, a tablet computer, an e-reader, a remote control, a notebook computer, an in-vehicle device, or a wearable device.

Referring to FIG. 1, FIG. 1 is a schematic configuration diagram of a charging circuit according to an embodiment of the present invention. As shown in FIG. 1, the charging circuit includes a wired connection module 11, a wireless charging module 12, a switch circuit 13, a control circuit 14, a shunt circuit 15, and a charge management module 16.
The first input / output terminal 111 of the wired connection module 11 is configured to be connected to the output terminal of the wired charger, and the second input / output terminal 112 of the wired connection module 11 is configured to be the first of the switch circuit 13. Connected to the input end 131, the second input / output end 112 of the wired connection module 11 is further connected to the first input / output end 151 of the shunt circuit 15,
The first input terminal 141 of the control circuit 14 is connected to the second input / output terminal 112 of the wired connection module 11, the output terminal 142 of the control circuit 14 is connected to the enable terminal 121 of the wireless charging module 12,
The output terminal 122 of the wireless charging module 12 is connected to the second input terminal 132 of the switch circuit 13,
The first output terminal 133 of the switch circuit 13 is connected to the input / output terminal 161 of the charge management module 16,
The second input / output terminal 152 of the shunt circuit 15 is connected to the input / output terminal 161 of the charge management module 16, and the third end 153 of the shunt circuit 15 is connected to the output terminal 122 of the wireless charging module 12. And
The output end of the charge management module 16 is configured to be connected to a battery.

  As can be learned from the above, the charging circuit provided in this embodiment of the present invention can realize wired charging and wireless charging for the battery of the terminal, thereby providing wired charging technology and wireless charging technology. To solve the problem of how to integrate on the terminal.

  Optionally, the impedance of the shunt circuit 15 can be smaller than the impedance of the switch circuit 13, so that the impedance generated after the shunt circuit 15 and the switch circuit 13 are connected in parallel is smaller, High current can be used to charge the battery.

  Optionally, the wired connection module 11 can be a USB interface.

  Optionally, the charge management module 16 can be a charge management chip.

  Since the wired connection module 11 can be configured to receive the first charging signal output by the wired charger, the first charging signal is transmitted to the second input / output terminal 112 of the wired connection module 11. The battery is charged after passing through the first input terminal 131 of the switch circuit 13, the first output terminal 133 of the switch circuit 13, the input / output terminal 161 of the charge management module 16, and the output terminal of the charge management module 16. be able to. In addition, if the third end 153 of the shunt circuit 15 does not receive the second charging signal output by the output end 122 of the wireless charging module 12, the first input / output end 151 of the shunt circuit 15 And the second input / output terminal 152 of the shunt circuit 15 is conducted, and the first charging signal is transmitted to the second input / output terminal 112 of the wired connection module 11 and the first input / output terminal of the shunt circuit 15. 151, the battery can be further charged after passing through the second input / output terminal 152 of the shunt circuit 15, the input / output terminal 161 of the charge management module 16, and the output terminal of the charge management module 16. In addition, after passing through the second input / output terminal 112 of the wired connection module 11, the first charging signal further flows into the first input terminal 141 of the control circuit 14, and the first charging signal of the control circuit 14 When the input terminal 141 receives the first charging signal, the output terminal 142 of the control circuit 14 can output a high level signal, and the high level signal can flow into the enable terminal 121 of the wireless charging module 12, When the enable terminal 121 of the wireless charging module 12 receives a high level signal, the output terminal 122 of the wireless charging module 12 does not output a signal. Therefore, when the first charging signal charges the battery, the output terminal 122 of the wireless charging module 12 does not output a signal, so that the wired charger can charge the battery.

  When the wired charger charges the battery, the flow direction of the first charge signal shown in FIG. 2 can be referred to for the flow direction of the first charge signal.

  Optionally, the wireless charging module 12 can be configured to receive a second charging signal output by the wireless charger, and when the enable end 121 of the wireless charging module 12 receives a low level signal, The second charging signal includes an output terminal 122 of the wireless charging module 12, a second input terminal 132 of the switch circuit 13, a first output terminal 133 of the switch circuit 13, an input / output terminal 161 of the charge management module 16, and Wireless charging of the battery can be performed after passing through the output terminal of the charge management module 16.

  During wireless charging, the flow direction of the second charge signal shown in FIG. 3 can be referred to for the flow direction of the second charge signal.

  Optionally, the enable end 121 of the wireless charging module 12 may be a constant low level port, i.e., the enable end 121 when the enable end 121 of the wireless charging module 12 does not receive a high level signal. Always remains in the low level state.

  Optionally, a Voltage Dynamic Power Management (VDPM) threshold may be present in the charge management module 16 and the VDPM threshold is pre-set to the lowest voltage limit value in the charge management module 16. The VDPM threshold functions that can be set are as follows. When the voltage of the charging signal is lower than the threshold value, the charge management module 16 reduces the current of the charging signal, and when the voltage of the charging signal is relatively low, the charging current becomes extremely low and the charging time Avoid being too long.

  In the above circuit, the second input / output terminal 112 of the wired connection module 11 is connected to the first input terminal 131 of the switch circuit 13, and the second input / output terminal 112 of the wired connection module 11 is connected to the shunt circuit 15. The first input / output terminal 151 of the switch circuit 13 is further connected to the input / output terminal 161 of the charge management module 16, and the second input / output terminal of the shunt circuit 15 is connected to the first input / output terminal 151 of the shunt circuit 15. 152 is connected to the input / output terminal 161 of the charge management module 16. In this way, the shunt circuit 15 is connected in parallel to the switch circuit 13, that is, the shunt circuit 15 and the switch circuit 13 are connected to the second input / output terminal 112 of the wired connection module 11 and the input of the charge management module 16. / The output terminal 161 is connected in parallel. Furthermore, the impedance generated when the shunt circuit 15 and the switch circuit 13 are connected in parallel is smaller than the impedance of the shunt circuit 15, and occurs when the shunt circuit 15 and the switch circuit 13 are connected in parallel. The impedance is smaller than the impedance of the switch circuit 13. That is, after the shunt circuit 15 and the switch circuit 13 are connected in parallel, the impedance between the second input / output terminal 112 of the wired connection module 11 and the input / output terminal 161 of the charge management module 16 is relatively Therefore, when the first charging signal flows into the input / output terminal 161 of the charge management module 16, a relatively small voltage drop occurs. When a wired charger charges a battery using a high current (eg, 1 Amp or more), a relatively small voltage drop occurs on the path where the first charge signal is sent to the charge management module 16 . Therefore, since the first charging signal does not reach the VDPM threshold value of the charging circuit, it is possible to use a high current to charge the battery, and the battery charging speed is increased.

  Optionally, in this embodiment, the charge management module 16 is not limited, for example, the charge management module 16 may be a charge management module of a mobile phone or a tablet computer.

  Optionally, the wireless charging module 12 can receive the second charging signal transmitted by the wireless charger, or can receive the electromagnetic wave signal transmitted by the wireless charger. For example, when the wireless charger is operating, since the terminal provided with the charging circuit is disposed above the wireless charger, the wireless charging module 12 receives an electromagnetic wave signal transmitted by the wireless charger. be able to. It should be noted that when a terminal provided with a charging circuit is placed above the wireless charger, the battery is charged by electromagnetic induction.

Optionally, as shown in FIG. 4, the circuit can further include a controller 17,
The enable end 121 of the wireless charging module 12 is further connected to the first input / output end 171 of the controller 17,
The first input / output terminal 111 of the wired connection module 11 can be further connected to an external device.

  Referring to FIG. 6, the fact that the third end 153 of the shunt circuit 15 is connected to the output end 122 of the wireless charging module 12 specifically means that the third end 153 of the shunt circuit 15 is protected. It may be connected to the output 122 of the wireless charging module 12 using the circuit 20.

  Optionally, the controller 17 is configured such that when the first input / output end 111 of the wired connection module 11 is connected to an external device, that is, the first input / output end 111 of the wired connection module 11 is an external device. (For example, the controller 17 can receive a signal indicating that an external device has been inserted using the id interface of the wired connection module). 17 outputs a high level signal to the enable terminal 121 of the wireless charging module 12, and controls the output terminal 122 of the wireless charging module 12 so as not to output the signal, that is, wireless charging can be disabled. The output 122 of the wireless charging module 12 sends a low level signal to the protection circuit 20 to ensure that the shunt circuit 15 remains closed. The controller 17 can control the output 122 of the wireless charging module 12 to send a low level signal to the protection circuit 20 (eg, using an I2C bus), thus closing the shunt circuit 15 Guarantee to leave. The controller 17 can control the charge management module 16 (eg, using an I2C bus), so that the current output by the charge management module 16 is the second input / output of the shunt circuit 15. After passing through the end 152, the first input / output end 151 of the shunt circuit 15, the second input / output end 112 of the wired connection module 11, and the first input / output end 111 of the wired connection module 11, the external The device can be powered.

  Since the terminal to which the above charging circuit belongs performs electrical signal (for example, current signal) transmission with an external device, a host device such as a computer does not need to be involved in the signal transmission processing, and therefore OTG (On The Go) Function is realized. The OTG function refers to a technology that realizes signal transmission between devices without a host. For example, if the above charging circuit is a mobile phone charging circuit, the mobile phone uses OTG technology to charge an external device using the above charging circuit without requiring the use of a computer To do. The external device may be a battery-equipped terminal such as a mobile phone, tablet computer, e-reader, remote control, notebook computer, in-vehicle device, or wearable device that can implement OTG (On The Go) Good.

  Optionally, when the first input / output end 111 of the wired connection module 11 is connected to an external device, the controller 17 outputs a high level signal to the enable end 121 of the wireless charging module 12 and wirelessly When the enable terminal 121 of the charging module 12 receives a high level signal, the second input / output terminal of the wireless charging module 12 is prohibited from outputting a signal. Therefore, when electrical signal transmission is performed with an external device, wireless charging is prohibited, and collision between the electrical signal and the second charging signal is avoided.

  Optionally, the controller 17 may be a terminal system chip, ie an AP (application processor) chip, such as a mobile phone system chip or a tablet computer system chip.

  Optionally, as shown in FIG. 5, the circuit may further include a display signal transmission circuit 18 and a display screen 19, where the input terminal 181 of the display signal transmission circuit 18 is the second output terminal of the switch circuit 13. 134, the output terminal 182 of the display signal transmission circuit 18 is connected to the second input / output terminal 172 of the controller 17, and the input terminal 191 of the display screen 19 is connected to the third input / output terminal 173 of the controller 17. Connected to.

  Optionally, the switch circuit 13 is further configured to output a high level signal using the second output 134 of the switch circuit 13 when the switch circuit 13 receives the first charging signal. The display signal transmission circuit 18 can be configured to output a low level signal to the controller 17 when receiving a high level signal output from the second output end 134 of the switch circuit 13. And the controller 17 can be further configured to output a first display command to the display screen 19 according to the low level signal transmitted by the display signal transmission circuit 18, the display screen 19 being the first display A first display message can be displayed according to the instructions, and the first display message can be used to indicate that wired charging is currently being performed on the battery.

  Optionally, the switch circuit 13 may be further configured such that the second output 134 of the switch circuit 13 outputs a low level signal when the switch circuit 13 receives the second charging signal. The display signal transmission circuit 18 can be further configured to output a high level signal to the controller 17 when the low level signal output by the second output 134 of the switch circuit 13 is received. The controller 17 can be configured to output a second display command to the display screen 19 according to the high level signal transmitted by the display signal transmission circuit 18, and the display screen 19 Accordingly, a second display message can be displayed and the second display message can be used to indicate that wireless charging is currently being performed on the battery.

  Optionally, the switch circuit 13 is further configured to output a low level signal using the second output 134 of the switch circuit 13 when the switch circuit 13 receives the first charging signal. The display signal transmission circuit 18 can be configured to output a high level signal to the controller 17 when the low level signal output from the second output terminal 134 of the switch circuit 13 is received. And the controller 17 can be further configured to output a first display command to the display screen 19 according to the high level signal transmitted by the display signal transmission circuit 18, the display screen 19 being the first display A first display message can be displayed according to the instructions, and the first display message can be used to indicate that wired charging is currently being performed on the battery.

  Optionally, the switch circuit 13 is further configured to output a high level signal using the second output 134 of the switch circuit 13 when the switch circuit 13 receives the second charging signal. The display signal transmission circuit 18 can be further configured to output a low level signal to the controller 17 when receiving a high level signal output by the second output 134 of the switch circuit 13. The controller 17 can be configured to output a second display command to the display screen 19 in accordance with the low level signal transmitted by the display signal transmission circuit 18, and the display screen 19 A second display message can be displayed according to the instructions, and the second display message can be used to indicate that wireless charging is currently being performed on the battery.

  In this embodiment, when wired charging is performed, the display screen 19 outputs a first display message to indicate to the user that wired charging is currently being performed on the battery, or wireless charging is performed. When done, display screen 19 outputs a second display message to indicate to the user that wireless charging is currently being performed on the battery.

  Optionally, the first display message and the second display message can be implemented using different display colors to indicate that wired or wireless charging is being performed on the battery. . For example, when the indicator on the display screen displays red, a first display message is indicated, and when the indicator on the display screen displays green, a second display message is indicated. Alternatively, the first display message and the second display message can be implemented to display that wired charging or wireless charging is performed on the battery using different display contents. For example, the text displayed on the display screen of the first display message is “wired charging”, and the text displayed on the display screen of the second display message is “wireless charging”.

Optionally, referring to FIG. 6, shunt circuit 15 includes at least one group of P-type MOS transistors,
Each group of P-type MOS transistors includes a first P-type MOS transistor T1 and a second P-type MOS transistor T2, and the drain electrode of the first P-type MOS transistor T1 is the second input of the wired connection module 11. / Connected to the output terminal 112, the source electrode of the first P-type MOS transistor T1 is connected to the source electrode of the second P-type MOS transistor T2, and the drain electrode of the second P-type MOS transistor T2 is the charge management module 16 is connected to the input / output terminal 161, the gate electrode of the first P-type MOS transistor T1 is connected to the gate electrode of the second P-type MOS transistor T2, and the gate electrode of the first P-type MOS transistor T1 is Further connected to the output terminal 122 of the wireless charging module 12. That the gate electrode of the first P-type MOS transistor T1 is further connected to the output end 122 of the wireless charging module 12, specifically, the gate electrode of the first P-type MOS transistor T1 is connected to the protection circuit 20 Can be used to connect to the output end 122 of the wireless charging module 12.

  The protection circuit 20 includes a resistor R1, a resistor R2, and a capacitor C1, and the resistor R1 is connected in series between the gate electrode of the first P-type MOS transistor T1 and the output terminal 122 of the wireless charging module 12, The capacitor C1 is connected in series between the gate electrode of the first P-type MOS transistor T1 and the ground, and the resistor R2 is connected in series between the output terminal 122 of the wireless charging module 12 and the ground.

  In this embodiment, when wired charging is performed, that is, when the second input / output terminal 112 of the wired connection module 11 outputs the first charging signal, the output terminal 122 of the wireless charging module 12 is subjected to the second charging. The drain electrode of the first P-type MOS transistor T1 does not output a signal, receives the first charging signal output from the second input / output terminal 112 of the wired connection module 11, and the resistance of the protection circuit 20 R1 does not receive the second charging signal. Therefore, the level of the connection point between the resistor R1 and the gate electrode of the first P-type MOS transistor T1 is a low level, that is, the voltage of the drain electrode of the first P-type MOS transistor T1 is the first P-type Since the voltage is higher than the voltage of the gate electrode of the MOS transistor T1, the drain electrode of the first P-type MOS transistor T1 and the source electrode of the first P-type MOS transistor T1 are conducted. Therefore, the first charging signal is transmitted to the source electrode of the second P-type MOS transistor T2, and the gate electrode of the second P-type MOS transistor T2 is connected to the gate electrode of the first P-type MOS transistor T1. That is, since the level of the gate electrode of the second P-type MOS transistor T2 is equal to the level of the gate electrode of the first P-type MOS transistor T1, the voltage of the source electrode of the second P-type MOS transistor T2 is The voltage of the second P-type MOS transistor T2 is higher than the voltage of the gate electrode, and therefore the drain electrode of the second P-type MOS transistor T2 and the source electrode of the second P-type MOS transistor T2 are conducted. In this way, the first charge signal is transmitted to the charge management module. Furthermore, when the wired connection module 11 is connected to an external device, the controller 17 can output a high level signal to the enable end 121 of the wireless charging module 12, and the output end 122 of the wireless charging module 12 is the second charging. When a terminal provided with a charging circuit needs to supply power to an external device because no signal is output, the charge management module 16 sends a third electrical signal to the drain electrode of the second P-type MOS transistor T2. Since the voltage of the drain electrode of the second P-type MOS transistor T2 is higher than the voltage of the gate electrode of the second P-type MOS transistor T2, the drain electrode of the second P-type MOS transistor T2 Are electrically connected to the source electrode of the second P-type MOS transistor T2. In this way, the third electric signal is transmitted to the source electrode of the first P-type MOS transistor T1, and the voltage of the source electrode of the first P-type MOS transistor T1 is the gate of the first P-type MOS transistor T1. Since the voltage is higher than the electrode voltage, the drain electrode of the first P-type MOS transistor and the source electrode of the first P-type MOS transistor are conducted. In this way, the third electrical signal is transmitted to the wired connection module 11, thereby realizing power supply to the external device. Furthermore, since the source electrode of the first P-type MOS transistor T1 is connected to the source electrode of the second P-type MOS transistor T2, the diode in the first P-type MOS transistor T1 and the second P-type MOS transistor T1 are connected. When the first P-type MOS transistor T1 and the second P-type MOS transistor T2 are not connected to each other, they are connected in a reverse direction to the diode in the MOS transistor T2. It is possible to avoid a current flowing through the module 11, and thus a backflow of the current can be avoided.

  Optionally, the source electrode of the first P-type MOS transistor T1 may be further connected to the second input / output terminal 112 of the wired connection module 11, and the drain electrode of the first P-type MOS transistor T1 May be further connected to the drain electrode of the second P-type MOS transistor T2, and the source electrode of the second P-type MOS transistor T2 may be further connected to the input / output terminal 161 of the charge management module 16 The gate electrode of the first P-type MOS transistor T1 may be further connected to the gate electrode of the second P-type MOS transistor T2, and the gate electrode of the first P-type MOS transistor T1 It may be further connected to the output end 122 of the wireless charging module 12.

  The principle of this embodiment is the same as the principle of the above embodiment in which the source electrode of the first P-type MOS transistor T1 is connected to the source electrode of the second P-type MOS transistor T2, and the first charge signal Is transmitted to the charge management module 16, and the data signal is transmitted to the wired connection module 11, so that the backflow of current can be prevented.

  In the two embodiments described above, the shunt circuit 15 uses at least one group of P-type MOS transistors. Since the impedance of the MOS transistor can be made extremely low, the impedance of the shunt circuit 15 is extremely low. The shunt circuit 15 and the switch circuit 13 are connected in parallel on the path between the wired connection module 11 and the charge management module 16, and therefore the impedance on the path between the wired connection module 11 and the charge management module 16 is It can be realized that the voltage drop of the first charging signal from the wired connection module 11 to the charge management module 16 is very low, and that the wired charger can use high current to charge the battery. Can be realized. In addition, as shown in FIG. 6, the shunt circuit 15 can further include at least another group of P-type MOS transistors including a third P-type MOS transistor T3 and a fourth P-type MOS transistor T4.

  Optionally, as shown in FIG. 6, the switch circuit 13 may be a two-input switch, eg, a load switch.

Optionally, as shown in FIG. 6, the control circuit 14 includes a resistor R3, a resistor R4, a resistor R5, and a first N-type MOS transistor T5,
One end of the resistor R3 is connected to the second input / output end 112 of the wired connection module 11, and the other end of the resistor R3 is separately connected to the gate electrode of the first N-type MOS transistor and one end of the resistor R4. One end of R4 is connected to the gate electrode of the first N-type MOS transistor, the other end of the resistor R4 is grounded, and the drain electrode of the first N-type MOS transistor is connected to a stable potential, The source electrode of the first N-type MOS transistor T5 is connected to the enable terminal 121 of the wireless charging module 12, and the source electrode of the first N-type MOS transistor T5 is further grounded using the resistor R5.

  Optionally, the stable potential voltage can be lower than the voltage of the first charging signal. A stable potential can provide a stable potential and may be a port in the terminal to which the charging circuit belongs, for example a port providing 1.8V.

  In this embodiment, when the second input / output terminal 112 of the wired connection module 11 outputs the first charging signal, the voltage of the first charging signal is higher than the voltage of the stable potential, so the first N The source electrode of the n-type MOS transistor T5 is electrically connected to the drain electrode of the first n-type MOS transistor T5, and the drain electrode of the first n-type MOS transistor T5 is provided by a stable potential at the enable end of the wireless charging module 12. Output a stable voltage signal. Since the stable voltage signal is a high level signal, the wireless charging module 12 prohibits the output 122 from outputting a signal, thus realizing that only the first charging signal charges the battery. .

Optionally, as shown in FIG. 6, the display signal transmission circuit 18 includes a resistor R6, a resistor R7, and a second N-type MOS transistor T6,
The gate electrode of the second N-type MOS transistor T6 is connected to the second output terminal 134 of the switch circuit 13, and the gate electrode of the second N-type MOS transistor T6 is further grounded using the resistor R7, The drain electrode of the second N-type MOS transistor T6 is connected to the second input / output terminal 172 of the controller 17, and the drain electrode of the second N-type MOS transistor is further connected to a stable potential using the resistor R6. The source electrode of the second N-type MOS transistor T6 is grounded.

  Optionally, the stable potential used by resistor R6 to connect to a stable potential is used to connect the drain electrode of first N-type MOS transistor T5 in the above embodiment to a stable potential. May be the same power supply or the same port.

  In this embodiment, when the switch circuit 13 receives the first charging signal, the second output terminal 134 of the switch circuit 13 outputs a high level signal, that is, the gate electrode of the second N-type MOS transistor is high. The signal received by the level electrode and further received by the drain electrode of the second N-type MOS transistor T6 is a signal obtained after the stable potential signal is dropped by the resistor R6. Therefore, the source electrode of the second N-type MOS transistor T6 and the drain electrode of the second N-type MOS transistor T6 are conducted, and the drain electrode of the second N-type MOS transistor is thus grounded, that is, The drain electrode of the second N-type MOS transistor T6 outputs a low level signal. That is, the drain electrode of the second N-type MOS transistor outputs a low level signal to the controller 17, then the controller 17 sends the first display command to the display screen 19, and then the display screen 19 displays the first display. Display a message. In this way, displaying the first display message using the display screen 19 can indicate that the wired charger is charging the battery. When the switch circuit 13 receives the second charge signal, the second output terminal 134 of the switch circuit 13 outputs a low level signal, that is, the gate electrode of the second N-type MOS transistor T6 receives the low level signal. Furthermore, the signal received by the drain electrode of the second N-type MOS transistor T6 is a signal obtained after a stable potential signal is dropped by the resistor R6. Therefore, the source electrode of the second N-type MOS transistor and the drain electrode of the second N-type MOS transistor T6 are not conducted, and the drain electrode of the second N-type MOS transistor T6 outputs a high level signal. That is, the drain electrode of the second N-type MOS transistor T6 outputs a high level signal to the controller, then the controller 17 sends a second display command to the display screen 19, and then the display screen 19 displays the second display. Display a message. In this way, displaying the second display message using the display screen 19 can indicate that the wireless charger is charging the battery.

Optionally, as shown in FIG. 6, the charging circuit further includes a first electrostatic protection circuit 21, which includes a capacitor C2, a capacitor C3, and an electrostatic protection diode D1. Including
One end of the capacitor C2 is connected to the output end 122 of the wireless charging module 12, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is connected to the output end 122 of the wireless charging module 12, and the other end of the capacitor C3 is grounded. Then, one end of the electrostatic protection diode D1 is connected to the output end 122 of the wireless charging module 12, and the other end of the electrostatic protection diode D1 is grounded. Furthermore, the output terminal 122 of the wireless charging module 12 may be further connected to the second input terminal 132 of the switch circuit.

  In this embodiment, electrostatic protection for the output end 122 of the wireless charging module 12 can be achieved, preventing static electricity from damaging the wireless charging module.

Optionally, as shown in FIG. 6, the charging circuit further includes a second ESD protection circuit 22, which includes an ESD protection diode D2,
One end of the electrostatic protection diode D2 is connected to the enable end 121 of the wireless charging module 12 and the first input / output end 171 of the controller 17, and the other end of the electrostatic protection diode D2 is grounded.

  In this embodiment, electrostatic protection for the enable end 121 of the wireless charging module 12 can be achieved, preventing static electricity from damaging the wireless charging module.

  Optionally, as shown in FIG. 6, the wired connection module 11 further includes a ground end 113, the ground end 113 is grounded, the wireless charging module 12 further includes a ground end 123, and the ground end 123 is grounded. Has been.

  Furthermore, an embodiment of the present invention further provides a terminal, which can include any of the charging circuits provided in the embodiments of the present invention, which will not be described again here.

  In the above technical solution, the first input / output end of the wired connection module is configured to be connected to the output end of the wired charger, and the second input / output end of the wired connection module is connected to the switch circuit. Connected to the first input terminal, the second input / output terminal is further connected to the first input / output terminal of the shunt circuit, and the first input terminal of the control circuit is the second input of the wired connection module. The output end of the control circuit is connected to the enable end of the wireless charging module, the output end of the wireless charging module is connected to the second input end of the switch circuit, and the first end of the switch circuit The output end is connected to the input / output end of the charge management module, the second input / output end of the shunt circuit is connected to the input / output end of the charge management module, and the third end of the shunt circuit is Connect to the output end of the wireless charging module Is, the output end of the charging management module is configured to be connected to the battery. In this way, the above circuit can realize wired charging and wireless charging for the battery of the terminal, thereby how to integrate the wired charging technique and the wireless charging technique on the terminal. The problem can be solved.

  What has been disclosed above is merely an exemplary embodiment of the present invention and does not in any way limit the protection scope of the present invention. Accordingly, equivalent modifications made in accordance with the claims of the present invention are intended to be included within the scope of the present invention.

11 Wired connection module
12 Wireless charging module
13 Switch circuit
14 Control circuit
15 Shunt circuit
16 Charge management module
17 Controller
18 Display signal transmission circuit
19 Display screen
20 Protection circuit
21 First electrostatic protection circuit
22 Second electrostatic protection circuit
111 First input / output terminal
112 Second input / output terminal
113 Ground end
121 Enable end
122 Output terminal
123 Ground end
131 1st input
132 Second input
133 1st output terminal
134 Second output
141 First input
142 Output terminal
151 First input / output terminal
152 Second input / output terminal
153 3rd end
161 Input / output terminal
171 First input / output terminal
172 Second input / output terminal
173 3rd input / output terminal
181 Input terminal
182 output terminal
191 Input terminal

According to a first aspect, the present invention provides a charging circuit including a wired connection module, a wireless charging module, a switch circuit, a control circuit, a shunt circuit, and a charge management module,
The first input / output end of the wired connection module is configured to be connected to the output end of the wired charger, and the second input / output end of the wired connection module is connected to the first input end of the switch circuit. The second input / output end of the wired connection module is further connected to the first input / output end of the shunt circuit;
The first input / output terminal of the control circuit is connected to the second input / output terminal of the wired connection module, Chikaratan out of the control circuit is connected to the enable port of the wireless charging module,
The output end of the wireless charging module is connected to the second input end of the switch circuit,
The first output terminal of the switch circuit is connected to the input / output terminal of the charge management module,
The second input / output end of the shunt circuit is connected to the input / output end of the charge management module, and the third end of the shunt circuit is connected to the output end of the wireless charging module,
The output end of the charge management module is configured to be connected to a battery.

According to a second aspect, the present onset Ming further provides a terminal including a charging circuit according to any one of the embodiments provided in the first aspect.

Claims (12)

A charging circuit including a wired connection module, a wireless charging module, a switch circuit, a control circuit, a shunt circuit, and a charge management module,
A first input / output terminal of the wired connection module is configured to be connected to an output terminal of a wired charger, and a second input / output terminal of the wired connection module is a first input terminal of the switch circuit. And the second input / output terminal is further connected to the first input / output terminal of the shunt circuit,
A first input terminal of the control circuit is connected to the second input / output terminal of the wired connection module; an output terminal of the control circuit is connected to an enable terminal of the wireless charging module;
The output end of the wireless charging module is connected to the second input end of the switch circuit,
A first output terminal of the switch circuit is connected to an input / output terminal of the charge management module;
A second input / output end of the shunt circuit is connected to the input / output end of the charge management module; a third end of the shunt circuit is connected to the output end of the wireless charging module;
The output end of the charge management module is configured to be connected to a battery.
Charging circuit. The wired connection module is configured to receive a first charging signal output by the wired charger, and the first charging signal is transmitted from the second input / output end of the wired connection module, Charging the battery after passing through the first input end of the switch circuit, the first output end of the switch circuit, the input end of the charge management module, and the output end of the charge management module; If the third end of the circuit does not receive the second charging signal output by the output end of the wireless charging module, the first input / output end of the shunt circuit and the shunt circuit The second input / output terminal is conductive, and the first charging signal is transmitted from the second input / output terminal of the wired connection module, the first input / output terminal of the shunt circuit, and the shunt circuit. The battery is charged after passing through the second input / output end of the circuit, the input end of the charge management module, and the output end of the charge management module, and the first charge signal is the wired connection When further transmitted to the first input terminal of the control circuit using the second input / output terminal of the module, and when the first input terminal of the control circuit receives the first charging signal The output end of the control circuit outputs a high level signal, the high level signal is transmitted to the enable end of the wireless charging module, and the enable end of the wireless charging module receives the high level signal. The output end of the wireless charging module does not output a signal, or
The wireless charging module is configured to receive a second charging signal output by a wireless charger, the enable end of the wireless charging module receives a low level signal, and the second charging signal is: Passed through the output terminal of the wireless charging module, the second input terminal of the switch circuit, the first output terminal of the switch circuit, the input terminal of the charge management module, and the output terminal of the charge management module. To charge the battery later,
The circuit according to claim 1. That the third end of the shunt circuit is connected to the output end of the wireless charging module means that the third end of the shunt circuit specifically uses the protection circuit to perform the wireless charging. Is connected to the output end of the module,
The circuit according to claim 1 or 2. The shunt circuit includes at least one group of P-type MOS transistors,
Each group of P-type MOS transistors includes a first P-type MOS transistor and a second P-type MOS transistor, and the drain electrode of the first P-type MOS transistor is the second input / output of the wired connection module. Connected to an output terminal, a source electrode of the first P-type MOS transistor is connected to a source electrode of the second P-type MOS transistor, and a drain electrode of the second P-type MOS transistor is connected to the charge management module. The gate electrode of the first P-type MOS transistor is connected to the gate electrode of the second P-type MOS transistor, and the gate electrode of the first P-type MOS transistor is connected to the input / output terminal. Connected to the output end of the wireless charging module using a protection circuit, or
Each group of P-type MOS transistors includes a first P-type MOS transistor and a second P-type MOS transistor, and the source electrode of the first P-type MOS transistor is the second input / output of the wired connection module. Connected to the output terminal, the drain electrode of the first P-type MOS transistor is connected to the drain electrode of the second P-type MOS transistor, and the source electrode of the second P-type MOS transistor is connected to the charge management module The gate electrode of the first P-type MOS transistor is connected to the gate electrode of the second P-type MOS transistor, and the gate electrode of the first P-type MOS transistor is connected to the input / output terminal. Connected to the output end of the wireless charging module using a protection circuit;
The circuit according to claim 3. The control circuit includes a resistor R3, a resistor R4, a resistor R5, and a first N-type MOS transistor,
One end of the resistor R3 is connected to the second input / output end of the wired connection module, and the other end of the resistor R3 is connected to the gate electrode of the first N-type MOS transistor and one end of the resistor R4. The one end of the resistor R4 is connected to the gate electrode of the first N-type MOS transistor, the other end of the resistor R4 is grounded, and the drain electrode of the first N-type MOS transistor has a stable potential. The source electrode of the first N-type MOS transistor is connected to the enable end of the wireless charging module, and the source electrode of the first N-type MOS transistor is connected to the resistor R5. Use for further grounding,
The circuit according to any one of claims 1 to 4. The circuit further includes a controller, and the enable end of the wireless charging module is further connected to a first input / output end of the controller;
The first input / output end of the wired connection module is further configured to be connected to an external device;
The controller is configured to output a high level signal to the enable end of the wireless charging module when the first input / output end of the wired connection module is connected to the external device, The output terminal of the wireless charging module does not output a signal when the enable terminal of the wireless charging module receives the high level signal,
The controller is further configured to control the charge management module, and the current output by the charge management module is the second input / output end of the shunt circuit, the first input of the shunt circuit. Supplying power to the external device after passing through the second input / output end of the wired connection module and the first input / output end of the wired connection module;
The circuit according to any one of claims 1 to 5. The circuit further includes a display signal transmission circuit and a display screen, an input terminal of the display signal transmission circuit is connected to a second output terminal of the switch circuit, and an output terminal of the display signal transmission circuit is connected to the controller. Connected to a second input / output end, the input end of the display screen is connected to a third input / output end of the controller,
The switch circuit is further configured to output a high level signal using the second output terminal of the switch circuit when the switch circuit receives the first charge signal, and the display signal transmission When the input terminal of the circuit receives the high level signal, the display signal transmission circuit outputs a low level signal to the controller, and the controller transmits the low level signal transmitted by the display signal transmission circuit. Is further configured to output a first display command to the display screen according to the first display command, the display screen is configured to display a first display message according to the first display command, The display message is used to indicate that wired charging is currently being performed on the battery, and the switch circuit is configured such that the switch circuit is a second one. When the charging signal is received, the switch circuit is further configured to output a low level signal using the second output terminal of the switch circuit, and the input terminal of the display signal transmission circuit receives the low level signal. When the display signal transmitting circuit outputs a high level signal to the controller, the controller outputs a second display command to the display screen according to the high level signal transmitted by the display signal transmitting circuit. The display screen is further configured to display a second display message according to the second display command, and the second display message is a wireless charge for the battery. Used to indicate what is currently running, or
The switch circuit is further configured to output a low level signal using the second output terminal of the switch circuit when the switch circuit receives the first charging signal, and the display signal When the input terminal of the transmission circuit receives the low level signal, the display signal transmission circuit outputs a high level signal to the controller, and the controller transmits the high level signal transmitted by the display signal transmission circuit. Further configured to output a first display command on the display screen according to a signal, the display screen configured to display a first display message according to the first display command, the first display command The display message is used to indicate that wired charging is currently being performed on the battery, and the switch circuit When receiving the second charging signal, the switch circuit is further configured to output a high level signal using the second output terminal of the switch circuit, and the input terminal of the display signal transmitting circuit is the high signal. When the level signal is received, the display signal transmission circuit outputs a low level signal to the controller, and the controller outputs a second signal to the display screen according to the low level signal transmitted by the display signal transmission circuit. The display screen is further configured to display a second display message in accordance with the second display command, and the second display message is sent to the battery. Used to indicate that wireless charging is currently being performed,
The circuit according to claim 6. The protection circuit includes a resistor R1, a resistor R2, and a capacitor C1, and the resistor R1 is connected in series between the gate electrode of the first P-type MOS transistor and the output terminal of the wireless charging module. The capacitor C1 is connected in series between the gate electrode of the first P-type MOS transistor and the ground, and the resistor R2 is connected between the output terminal of the wireless charging module and the ground. Connected in series,
The circuit according to claim 4. The display signal transmission circuit includes a resistor R6, a resistor R7, and a second N-type MOS transistor,
The gate electrode of the second N-type MOS transistor is connected to the second output terminal of the switch circuit, the gate electrode of the second N-type MOS transistor is further grounded using the resistor R7, and The drain electrode of the second N-type MOS transistor is connected to the second input / output terminal of the controller, and the drain electrode of the second N-type MOS transistor is further stabilized at a stable potential using the resistor R6. Connected, the source electrode of the second N-type MOS transistor is grounded,
The circuit according to claim 7. The circuit further includes a first electrostatic protection circuit, and the first electrostatic protection circuit includes a capacitor C2, a capacitor C3, and an electrostatic protection diode D1.
One end of the capacitor C2 is connected to the output end of the wireless charging module, the other end of the capacitor C2 is grounded, one end of the capacitor C3 is connected to the output end of the wireless charging module, and the capacitor C3 The other end of the electrostatic protection diode D1 is connected to the output end of the wireless charging module, and the other end of the electrostatic protection diode D1 is grounded.
The circuit according to any one of claims 1 to 9. The circuit further includes a second electrostatic protection circuit, and the second electrostatic protection circuit includes an electrostatic protection diode D2,
One end of the electrostatic protection diode D2 is connected to the enable end of the wireless charging module and the first input / output end of the controller, and the other end of the electrostatic protection diode D2 is grounded.
The circuit according to any one of claims 1 to 10.   A terminal comprising the charging circuit according to any one of claims 1 to 11.

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